title: Flexible maximum likelihood methods for bivariate proportional hazards models.
mesh_terms: D000704:Analysis of Variance; D001699:Biometry / Q000379:methods*; D001766:Blindness / Q000453:epidemiology; D003922:Diabetes Mellitus, Type 1 / Q000503:physiopathology; D003930:Diabetic Retinopathy / Q000503:physiopathology; D018450:Disease Progression; D006801:Humans; D016013:Likelihood Functions; D015233:Models, Statistical; D016016:Proportional Hazards Models; D013997:Time Factors